Title :
Stability predictions for high-order ΣΔ modulators based on quasilinear modeling
Author_Institution :
Electron. Inst., Tech. Univ. Denmark, Lyngby, Denmark
fDate :
30 May-2 Jun 1994
Abstract :
This paper introduces a novel interpretation of the instability mechanisms in high-order one-bit Sigma-Delta modulators. Furthermore, it is demonstrated how the maximum stable amplitude range can be predicted very well. The results are obtained using an extension of the well known quasilinear modeling of the one-bit quantizer. The theoretical results are verified by numerical simulations of a number of realistic 4th order modulators designed by means of standard filter design tools. The results are useful for automated design and optimization of loop filters
Keywords :
circuit stability; modulators; quantisation (signal); sigma-delta modulation; 1 bit; automated design; high-order sigma-delta modulator; instability; loop filters; numerical simulation; one-bit quantizer; optimization; quasilinear modeling; stability; Delay; Delta modulation; Delta-sigma modulation; Filters; Linear systems; Predictive models; Quantization; Signal to noise ratio; Stability; Transfer functions;
Conference_Titel :
Circuits and Systems, 1994. ISCAS '94., 1994 IEEE International Symposium on
Conference_Location :
London
Print_ISBN :
0-7803-1915-X
DOI :
10.1109/ISCAS.1994.409382
